AMD EPYC 7001 Processors PSP1 Block Configuration out-of-bounds

CVSS Meta Temp Score
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CTI Interest Score
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7.2$0-$5k0.00

Summaryinfo

A vulnerability was found in AMD EPYC 7001 Processors, EPYC 7002 Processors, EPYC 7003 Processors, Ryzen 3000 Desktop Processors, Ryzen 5000 Desktop Processors, Ryzen 5000 Desktop Processor with Radeon Graphics, Athlon 3000 Desktop Processors with Radeon Graphics, Ryzen 4000 Desktop Processors with Radeon Graphics, Ryzen Threadripper 3000 Processors, Ryzen Threadripper PRO 5000WX Processors, Athlon 3000 Mobile Processors with Radeon Graphics, Ryzen 3000 Mobile Processors with Radeon Graphics, Ryzen 4000 Mobile Processors with Radeon Graphics, Ryzen 5000 Mobile Processors with Radeon Graphics, Ryzen 7020 Processors with Radeon Graphics, Ryzen 6000 Processors with Radeon Graphics, Ryzen 7035 Processors with Radeon Graphics, Ryzen 5000 Processors with Radeon Graphics, Ryzen 3000 Processors with Radeon Graphics, EPYC Embedded 7002 Processors, EPYC Embedded 3000 Processors, EPYC Embedded 7003 Processors, Ryzen Embedded R1000 Processors, Ryzen Embedded R2000 Processors, Ryzen Embedded 5000 Processors, Ryzen Embedded V1000 Processors, Ryzen Embedded V2000 Processors and Ryzen Embedded V3000 Processors. It has been rated as critical. The affected element is an unknown function of the component PSP1 Block Configuration Handler. The manipulation leads to out-of-bounds. This vulnerability is traded as CVE-2021-26344. An attack has to be approached locally. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in AMD EPYC 7001 Processors, EPYC 7002 Processors, EPYC 7003 Processors, Ryzen 3000 Desktop Processors, Ryzen 5000 Desktop Processors, Ryzen 5000 Desktop Processor with Radeon Graphics, Athlon 3000 Desktop Processors with Radeon Graphics, Ryzen 4000 Desktop Processors with Radeon Graphics, Ryzen Threadripper 3000 Processors, Ryzen Threadripper PRO 5000WX Processors, Athlon 3000 Mobile Processors with Radeon Graphics, Ryzen 3000 Mobile Processors with Radeon Graphics, Ryzen 4000 Mobile Processors with Radeon Graphics, Ryzen 5000 Mobile Processors with Radeon Graphics, Ryzen 7020 Processors with Radeon Graphics, Ryzen 6000 Processors with Radeon Graphics, Ryzen 7035 Processors with Radeon Graphics, Ryzen 5000 Processors with Radeon Graphics, Ryzen 3000 Processors with Radeon Graphics, EPYC Embedded 7002 Processors, EPYC Embedded 3000 Processors, EPYC Embedded 7003 Processors, Ryzen Embedded R1000 Processors, Ryzen Embedded R2000 Processors, Ryzen Embedded 5000 Processors, Ryzen Embedded V1000 Processors, Ryzen Embedded V2000 Processors and Ryzen Embedded V3000 Processors and classified as critical. This issue affects an unknown function of the component PSP1 Block Configuration Handler. The manipulation with an unknown input leads to a out-of-bounds vulnerability. Using CWE to declare the problem leads to CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

An out of bounds memory write when processing the AMD PSP1 Configuration Block (APCB) could allow an attacker with access the ability to modify the BIOS image, and the ability to sign the resulting image, to potentially modify the APCB block resulting in arbitrary code execution.

It is possible to read the advisory at amd.com. The identification of this vulnerability is CVE-2021-26344 since 01/29/2021. The exploitation is known to be difficult. Attacking locally is a requirement. Additional levels of successful authentication are needed for exploitation. The technical details are unknown and an exploit is not publicly available.

Upgrading eliminates this vulnerability.

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Productinfo

Vendor

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.2

VulDB Base Score: 6.4
VulDB Temp Score: 6.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.2
NVD Vector: 🔍

CNA Base Score: 7.2
CNA Vector (AMD): 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

01/29/2021 🔍
08/13/2024 +1291 days 🔍
08/13/2024 +0 days 🔍
03/18/2025 +217 days 🔍

Sourcesinfo

Advisory: amd.com
Status: Confirmed

CVE: CVE-2021-26344 (🔍)
GCVE (CVE): GCVE-0-2021-26344
GCVE (VulDB): GCVE-100-274379

Entryinfo

Created: 08/13/2024 19:05
Updated: 03/18/2025 21:16
Changes: 08/13/2024 19:05 (62), 03/18/2025 21:16 (12)
Complete: 🔍
Cache ID: 216::103

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